Gage for setting cutter-heads.



N6. 69|,33|. Patented Jan. I4, I902.

S. F. WISE. v GAGE FOB SETTING CUTTER HEADS.

(Application filed Apr. 25, 1901.)

(No Model.)

E Tmnm I WMW/ YHE "cams PEYERs w. mum-ummlwunmmon n c UNITED STATES PATENT OFFICE.

SOLOMON F. lVISE, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO H. B. SMITH MACHINE COMPANY, A CORPORATION OF NEW JERSEY.

GAGE FOR SETTING CUTTER-HEADS.

SPECIFICATION formingpart of Letters Patent No. 691,331, dated January 14, 1902.

Application filed April 25, 1901.

T0 aZZ whom it may concern.-

Be it known that I, SOLOMON F. WISE, a citizen of the United States, residing at No. 2H9 South Eighth street,Philadelphia, county of Philadelphia, and State of Pennsylvania, have invented anew and useful Improvement in Gages for Setting Gutter-Heads, of which the following is a full, clear and exact description, reference being had to the accompanying drawings, which form a part of this specification.

My invention relates to gages for setting knives of rotating cutter-heads, such as are used on woodworking-machines.

The object of my invention is to enable the knives to be adjusted so that their cutting edges are equidistant from the center of rotation.

Cutter-heads consist of a rotating block or cylinder provided with knives whose cutting edges project beyond the cylinder. These knives are usually two in number, although occasionally three and sometimes four are used. It is essential that the knives shall be adjusted so that the cutting edges of the several knives shall project equal distances beyond the cylinder-in other words, so that the severalcuttingedges are preciselyequidistant from the center of rotation; otherwise only one of the knives will cut, thus turning out work which is not perfectly smooth or reducing the quality of work performed proportionately to the number of knives not cutting, besides producing abnormal wear and tear on the cutter-heads themselves. The ordinary way of adjusting these knives is simply to use a rule or a strip of wood marked or notched at the proper distance. This necessarily gives only an approximately correct adjustment, which is quite as objectionable as no adjustment at all. The result is thatin many woodworking-machines only one knife of a cutter-head is actually in operation.

My invention consists of a gage one end of which is adapted to engage the side of the cutter-head or cylinder, While the other end is provided with an adjustable slide having a contact-piece of soft metal adapted to engage the knife-edge, the gage being adapted to embrace the cylinder;

In the drawings, Figure 1 is a side eleva- Serial No. 57,413. (No model.)

tion of the cylinder, showing the same with one knife in position and the gage applied thereto, the gage being shown in side elevation. Fig. 2 is a similar view, four knives being shown in their adjusted positions. Fig. 3 is a perspective view of the gage.

A is the block or cylinder; B B B B the knives; O, set-screws for securing the knives in their adjusted positions. The knives are slotted to permit them to be moved in and out.

The gage consists of the shank D, fixed bearing-block E, adjustable sliding head F, knife-en gaging block G,and set-screw H. The shank is curved at its rear end outwardly, inwardly, and forwardly and is provided at its extremity with the flat bearing-block E. The middle and front portions of the shank are straight, and a sliding head F embraces the shank and may be moved back and forth thereon. The set-screw H extends through F and engages the shank. The flat knife-engaging block G is secured to the head F.

The operation is as follows: The knife B is placed on the cylinder so that the cutting edge projects the desired distance beyond the cylinder. The gage is then applied, as shown in Fig. 1, and the sliding head moved forwardly until block G contacts with the knife. The set-screw is then tightened, locking the sliding head in position. Care should be taken to insure exact parallelism of the knifeedge with the axis of rotation, and therefore the gage should be applied to both ends of the knife and between the ends at intervals of three or four inches. During this operation the bearing-block E contacts with the side a of the cylinder. Knife B is then placed on the opposite side of the cylinder. The gage is then applied so that the bearing-block F engages side a of the cylinder and the knife adjusted at each end and intermediately so that the edge contacts with block G. It will be understood that the knife B is thereby adjusted so that its edge is the same distance from side a as the edge of knife B is from a. The cylinder being always symmetrically formed, the edges of knives B and B are therefore brought to precisely equal distances from the axis of rotation.

In case the cylinder has four knives the knives B and B are adjusted in the following manner: Knife B is placed on the cylinder, the sliding head loosened and moved forwardly, the gage applied, as shown in Fig. 2, so that the block E engages knife B and the sliding head moved inwardly until block G contacts with the edge of knife B. The gage is then applied so that block E engages knife 13 and the knife B adjusted at each end and intermediately so that the edge contacts with block G. The gage is then applied so that block E engages knife B and the knife 13 similarly adjusted.

Having now fully described my invention, what I claim, and desire to protect by Letters Patent, is-

1. As a new article of manufacture, a gage for setting on tter-head knives, consisting of a shank having a straight portion adapted to engage the flat face of the knife and projecting in front of the edge thereof and having a curved or bent rear portion the end of which is adapted to engage the fiat side of the cylinder adjacent to the side supporting the knife, and an adjustable sliding head upon the shank havingakhife-edge-en gaging block adapted to engage the end of the knife.

2. As a new article of manufacture, a gage for setting cutter-head knives consisting of a shank having a straight front and central portion, and arear portion curved or bent and terminatingin a bearing-block adapted to engage one of the flat sides of the cutter-head cylinder, and an adjustable head longitudinally slidahle upon the straight portion of the shank having a knife-edge-engaging block, and means for locking the head in its adjusted position.

3. As a new article of manufacture, a gage for setting cutter-head knives'consisting of a shank having its rear portion curved or bent and terminating in a flat bearing-block adapted to engage one of the fiat sides of the cutterhead cylinder and a straight front portion extending at right angles to the face of said block, and an adjustable head longitudinally slidable upon the straight portion of the shank having a knife-edge-engaging block, and means for locking the head in its adjusted position. v

In testimonyof which invention I have hereunto set my hand, at Petersburg, on this 15th day of April, 1901.

SOLOMON F. WISE.

Witnesses:

HARRY J ACK, JOHN D. WATKINS. 

